模拟信号的恢复及其误差研究

A Study on Analog Signal Reconstruction and Its Errors

数模混合仿真中模拟信号的恢复及其误差对整个仿真过程具有重要影响。本文探讨了用零阶保持和一阶保持进行信号恢复的方法，比较了它们的误差及工作特点。特别指出了一阶保持中，由于存在积分器复原时间及数字机操作时间的影响而会带来附加的误差，因此一阶保持方法较难达到其理论的精度。

The analog signal reconstruction and its errors have significant effects on hybrid analog digital simulation. In this paper, the methods of signil reconstruction using zero--order hold and first--order hold are studied, and the comparison of their errors and features is made. It is especially pointed out that an additional error would be generated in first-order hold because of the presence of integrator reset time and digital computer pracess time. Therefore, the theoratical accuracy is hardly obtained in first-order hold.